Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
  • B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2120/00—Construction of rigid or semi-rigid containers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2120/00—Construction of rigid or semi-rigid containers
  • B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
  • B31B50/26—Folding sheets, blanks or webs
  • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms

Definitions

• the present invention relates to a method of manufacturing a closed section packaging based on sheets incorporating at least one natural material such as wood as well as a closed section packaging made based on sheets incorporating at least a natural material such as wood.
• Closed section packaging has long been known, such as circular section packaging, such as hollow cylinders, used for example to protect bottles from impact.
• circular section packaging such as hollow cylinders, used for example to protect bottles from impact.
• a first solution consists in machining by turning a piece of wood to give it the shape of a tube.
• This solution is expensive and requires the use of pieces of wood with a diameter at least equal to that of the tube to be manufactured.
• the object of the invention is therefore to propose a method of manufacturing a closed section packaging based on sheets incorporating at least one natural material such as wood, and which does not require the machining of a workpiece. wood and whose cost price is advantageous.
• the method of manufacturing a closed section packaging based on sheets formed respectively of a sheet of flexible natural material uscoUé on a support sheet is remarkable in that it consists in winding a first sheet around '' a mandrel, the sheet being positioned with its sheet of natural material facing towards said mandrel so that it can form the internal wall of said packaging, to glue the external wall of the sheet or the internal wall of at least a second sheet, to wrap each sheet to stick it around the first sheet or a previously rolled sheet, the last sheet being positioned with its sheet of natural material turned towards the outside of the mandrel so that it can form the wall outer of the package, the step of winding each sheet taking place in such a way that the starting edge for winding the sheet does not coincide with the bo starting rd of winding of the first sheet or of a sheet previously rolled up.
• the manufacturing method consists in providing, in addition, a step of winding and gluing a reinforcing sheet between two sheets, the step of winding the reinforcing sheet s operating in such a way that the starting edge for winding the reinforcing sheet does not coincide with the starting edge for winding the sheets.
• the manufacturing process consists in shifting the winding starting edges of two sheets or sheet (s) of reinforcement intended to be glued to each other, by an angle ⁇ centered on the axis of the mandrel with a value close to: 2 ⁇ / number of sheets and backing sheets.
• the manufacturing process consists in respectively making perforations through sheets or reinforcement sheet (s), the perforations being centered on the same axis during their winding stages.
• the manufacturing process also includes providing a step of winding and gluing a sheet of material transparent plastic between two sheets or reinforcement sheet (s) so as to close the perforations.
• the manufacturing process consists in heating the mandrel to facilitate the winding of reinforcing sheets or sheets around it and to accelerate the drying time of the glue.
• the manufacturing process consists in establishing the temperature of the mandrel around 40 ° C.
• the manufacturing process consists in pressing, by a pressing roller, the reinforcing sheets or sheets or transparent plastic sheet during their windings on the mandrel.
• the manufacturing process consists in maintaining the reinforcing sheets or sheets or transparent plastic sheet around the mandrel, during the time of drying of the adhesive, by clamping means such as strapping .
• the manufacturing process consists of dipping the packaging in a paraffin bath to give its walls a seal against the outside.
• the invention also relates to a closed section packaging consisting of sheets respectively formed of a sheet of flexible natural material uscoUé on a support sheet.
• a closed section packaging consisting of sheets respectively formed of a sheet of flexible natural material uscoUé on a support sheet.
• Such a packaging is remarkable in that the sheets are glued by their faces in contact, and are arranged relative to each other in such a way that, on the one hand, the starting winding edge of each sheet does not coincide with the starting edge for winding the sheet or another sheet and, on the other hand, that their sheets of natural material respectively constitute the inner and outer walls of the package.
• the support sheet is a cardboard sheet.
• the natural material of each sheet of natural material is chosen from wood, cork or leather.
• the packaging further comprises a reinforcing sheet disposed between two sheets, the starting winding edge of the reinforcing sheet not coinciding with the starting winding edge of the sheets.
• the reinforcing sheet is a sheet of glass fibers.
• the reinforcing sheet is a plastic sheet.
• the angle ⁇ centered on the axis of the packaging and taken between the starting edges of the unwinding of two adjacent sheets or reinforcing sheets has a value close to: 2 ⁇ / number of sheets and backing sheets.
• the openings of the packaging are respectively closed by a bottom and a cover made of wood.
• the external wall and / or the bottom or the cover include a marking produced by pyrography.
• the openings of the packaging are respectively closed by a bottom and a cover made of metal.
• the reinforcing sheets or sheet (s) respectively comprise perforations centered on the same axis.
• FIG. . 1a represents a front view of a device for manufacturing a packaging of closed section of circular type according to the invention
• FIG. lb shows a sectional view of one of the sheets intended for the manufacture of a closed section package according to the invention
• FIG. 2 shows a front view of a device for manufacturing a packaging of circular section during a step of winding a first sheet according to the method of manufacturing a packaging of circular section according to the invention
• FIG. 3 shows a front view of a device for manufacturing a packaging of circular section at the end of the step of winding a first sheet according to the method of manufacturing a circular section packaging according to the invention
• FIG. 4 shows a front view of a device for manufacturing a packaging of circular section during the preparation of the step of winding a second sheet according to the method of manufacturing a packaging of circular section according to the invention
• Fig. 5 shows a front view of a device for manufacturing a packaging of circular section during the step of winding a second sheet according to the method of manufacturing a packaging of circular section according to the invention
• FIG. 6 shows a front view of a device for manufacturing a packaging of circular section at the end of the step of winding a second sheet according to the method of manufacturing a packaging of circular section according to invention
• FIG. 7 shows a perspective view of a circular section packaging produced by the manufacturing method according to the invention
• FIG. 8 shows a front view of a device for manufacturing a packaging of circular section at the end of the step of winding a sheet covering a reinforcing sheet according to a variant of the operating method of the manufacturing process.
• a packaging of circular section according to the invention shows a perspective view of a circular section packaging manufactured in a variant of the operating method of the manufacturing process according to the invention
• FIG. 10 shows a perspective view of a circular section packaging manufactured in another variant of the operating method of the manufacturing method according to the invention.
• the device 100 for manufacturing a package of closed section notably comprises a mandrel 110 intended to allow the wrapping of sheets F around it. It has for this purpose a pressing roller 120 making it possible to press one or more sheets F or other sheets against the mandrel 110 during their respective windings.
• the pressing roller 120 can, for this purpose, be kept under pressure against the mandrel 110 by a pressing device (not shown) incorporating a pressure means such as a jack or a spring.
• the mandrel 110 can be heated by a heating means, not shown, such as an electrical resistance, and which is intended to facilitate the winding of sheets around it.
• the mandrel 110 and the pressing roller 120 have a cylindrical section making it possible to manufacture packages of cylindrical section.
• the mandrel has a convex or concave polygonal section.
• the mandrel 110 and the pressing roller 120 are rotated in opposite directions to each other by a device not shown, and preferably mutually so that their peripheral speeds are substantially equal.
• a removable clamp 130 is mounted at the periphery of the mandrel 110 in a median plane thereto. It is provided with a groove 132 making it possible to accommodate an edge
• Fia intended for the start of the winding of a first sheet FI around the mandrel 110.
• the sheet FI wraps around said mandrel 110.
• the manufacturing device 100 also includes a support 200 intended to support a sheet F or another sheet before it is wound up. It comprises a flat seat 210 suitable for receiving the sheet F, and the plane passing through said seat 210 is tangent to the envelope of the mandrel 110.
• the height of this seat 210 can be modified so that the plane passing through that -this can be offset from the cylindrical shell of the mandrel 110, by a height multiple of that of the thickness of a sheet F.
• the plane passing through the support 200 intersects that passing through the axes of the mandrel 110 and the pressing roller 120 at a right angle, so that the driving of the sheet F by the pressing roller 120 and by the mandrel 110 is made in a direction parallel to that of the seat 210.
• the support 200 is bordered laterally by two rails 220 of which only one rail 220a is visible in this FIG., and which are intended to guide in a rectilinear movement each sheet F.
• the rails 220 are spaced a distance slightly greater than the height of a sheet F.
• each sheet F intended for the manufacture of a closed section packaging consists of a sheet of flexible natural material Fb such as wood, cork or leather and which is laminated on a support sheet Fc preferably made of cardboard.
• the sheet of natural material Fb is a sheet of wood.
• the manufacture of a closed section packaging takes place as follows.
• the mandrel 110 is preferably heated by its heating means.
• the heating temperature of the mandrel 110 is preferably established around 40 ° C.
• a first sheet FI is deposited on the seat 210 so that its sheet of natural material Fb is turned towards the mandrel 110 so that it can form the internal wall of a package, then its starting edge Fia d the winding is inserted between the pressing roller 120 and the mandrel 110, before being brought into the groove 132 of the clamp 130 in a direction indicated by the arrow A in FIG. 1.
• the mandrel 110 and the pressing roller 120 are then rotated in the directions indicated by the arrows B and C respectively.
• the sheet FI then wraps around the mandrel 110 according to arrow B.
• the length of this first sheet FI is such that it is at most equal to the circumference of the mandrel 110 and preferably equal, or slightly less than this circumference.
• Fia and its opposite edge Flb are now arranged opposite one another.
• the sheet FI then forms a cylinder.
• the edge Fia is held in the groove 132 of the clamp 130, while the opposite edge Flb is kept pressed between the pressing roller 120 and the mandrel 110.
• the outer wall of the sheet FI is then glued.
• a second sheet F2 can then be rolled up and glued to the sheet FI in the following manner.
• the sheet F2 is deposited on the seat 210 so that its sheet of natural material Fb is turned towards the outside of the mandrel 110 so that it can form the external wall of a package.
• the mandrel 110 is previously rotated so that the edge F2a of the sheet F2 does not coincide, during its bonding, with the edges F 1 a or F 1 b of the sheet FI.
• the angle ⁇ indicated in FIG. 5 which is centered on the mandrel 110 and taken between the edge Fia for starting the winding of the first sheet FI and the edge F2a for starting the winding of the second sheet F2 has a value close to: 2 ⁇ / number of sheets F, that is to say a value close to 180 ° C. in this FIG.
• the edge F2a of the sheet 2 is then inserted between the mandrel 110 and the glued outer wall of the sheet FI in a direction indicated by the arrow A.
• the mandrel 110 and the pressing roller 120 are rotated according to the arrows respectively B and C.
• the pressing roller 120 presses the sheet F2 against the sheet FI, which causes the intimate mutual bonding of the two sheets FI and F2 by their faces in contact.
• the mandrel 110 is heated, the heat released by the latter accelerates the drying time of the adhesive.
• the mandrel 110 has performed a complete rotation. It will be noted that the length of this second sheet F2 is such that it is at most equal to the circumference of the first sheet FI and preferably equal to or slightly less than this circumference.
• the removable clip 130 is removed.
• the pressing roller 120 can be held in position to confirm the bonding of the edge F2b opposite the edge F2a and disposed opposite it.
• FIG. 7 It consists of sheets FI and F2, and its internal and external walls consist respectively of a sheet of natural material Fb.
• the angle ⁇ indicated in FIG. 7 which is centered on the axis of the packaging and taken between the edge Fia of the start of winding of the first sheet FI and the edge F2a of the start of winding of the second sheet F2 has a value close to: 2 ⁇ / number of sheets F, that is to say a value close to 180 ° C. in this FIG.
• FIG. 9 An exemplary embodiment of a circular section packaging produced by this variant of the operating method of the manufacturing process is shown in FIG. 9.
• This packaging is constituted in this FIG. a reinforcing sheet Tl sandwiched between two sheets FI and F2.
• the internal and external walls of the packaging of the invention always consist respectively of a sheet of natural material Fb in order to present the appearance of a packaging made of a natural material.
• the angle ⁇ indicated in FIG. 9 which is centered on the axis of the packaging and taken between the winding starting edges Fia and Tla or Tla and F2a or F2a and Fia of the sheets FI, F2 or reinforcement sheets Tl has a value close to:
• the inner and outer walls of the packaging being made of a natural material Fb, it is possible to have thereon a marking M produced by pyrography, as it appears in FIG. 7.
• a bottom and a lid preferably made of a natural material are suitable for closing the openings of the packaging.
• the bottom and the cover can also be pyrographed.
• the bottom and the cover may, in one embodiment, be made of metal.
• the manufacturing process of the invention makes it possible to manufacture packages of closed section essentially produced in a natural material with a manufacturing cost comparable to those produced from sheets of cardboard wound in a helical shape.
• the process also allows the marking of packaging by pyrography.
• the sheet or sheets F or reinforcement sheets Tl can be held around the mandrel 110 during the drying time of the glue by clamping means, such as strapping, enveloping the periphery said sheets F or Tl reinforcement sheets.
• clamping means such as strapping, enveloping the periphery said sheets F or Tl reinforcement sheets.
• the packaging is dipped in a paraffin bath to give its walls a seal against the outside.
• perforations are made through sheets or reinforcement sheet (s) FI, Tl, F2. These perforations P are centered on the same axis during their winding steps. It is also possible to provide for a step of winding and gluing a sheet of transparent plastic material S between two sheets or sheet (s) of reinforcement FI, Tl, F2 so as to close the perforations P.
• An embodiment of a closed section packaging of circular type produced by this variant of the operating method of the manufacturing process is shown in FIG. 10. This packaging respectively comprise perforations P centered on the same axis making it possible to see inside the packaging to assess the product (s) intended to be contained therein. To avoid the introduction of dust inside the packaging, the perforations P are closed by a transparent plastic sheet S.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Making Paper Articles (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=8862703

Family Applications (1)

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Family Cites Families (4)

• 2001
  • 2001-04-24 FR FR0105597A patent/FR2823696B1/fr not_active Expired - Lifetime
• 2002
  • 2002-03-22 WO PCT/FR2002/001000 patent/WO2002085719A1/fr not_active Ceased
  • 2002-03-22 EP EP02722356A patent/EP1436205A1/de not_active Withdrawn

Non-Patent Citations (1)

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